Method for producing concrete aggregate

FIELD: construction.

SUBSTANCE: method for producing the concrete aggregate includes preparation of mass based on low-melting clays, capable to swell under conditions of heat treatment, its hydration up to 17-23%, formation of granules, melting into the surface of moulded granules of the crushed cement clinker sieved through mesh No. 5, drying, calcining at a temperature of 1100°C, cooling.

EFFECT: increase of the bond strength of aggregate with cement stone.

 

The invention relates to the production of aggregates for concrete.

A known method of manufacturing aggregate (expanded clay), including the preparation of the clay mass, moisture, forming granules, drying, calcination and cooling [1].

The task of the invention to provide a filler with a rough surface, increasing the strength of adhesion of the filler with cement stone.

The technical result is achieved in that in the method of manufacturing aggregate for concrete, including the preparation of the clay mass, moisture, forming granules, drying, firing and cooling, the surface of the formed granules put a layer of crushed and sifted through mesh No. 5 cement clinker.

The method is illustrated by the following example.

On the basis of fusible clays, able to swell in the heat-treated conditions, prepare the clay mass, moisturize up to 17-23% and using a perforated roller is formed into granules. Cement clinker crushed and sieved through sieve No. 5. On the surface of the formed granules applied (vtaplivajut) layer of crushed cement clinker. The granules are dried to a moisture content of 1-6% and calcined, for example, in a rotary drum furnaces at a temperature of 1100°C. the Finished pellets are cooled to a temperature of 20-50°C and sent to the warehouse of finished products. The aggregate received the first proposed method, has an uneven surface, is strongly linked with cement stone.

The source of information

1. Dudarov I., General technology of silicates. - M.: Stroiizdat, 1987. - S. 314-321.

A method of manufacturing aggregate for concrete, including the preparation of mass on the basis of fusible clays, able to swell in the conditions of the heat treatment, moisture up to 17-23%, molding granules, vtaplivaniem in the surface of the formed granules were sifted through mesh No. 5 crushed cement clinker, drying, calcination at 1100°C, cooling.



 

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